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quoting from the 7/93 trail guide:
The Sinaguan (Spanish for "without water") people made the most of their natural surroundings as is shown by the way the rock outcrop is incorporated into the building's construction. In addition to providing a solid foundation to build upon and against, the rock mass acted as a passive solar heat source. Heat from the sun, absorbed in the daytime, helped warm the rooms through the night.
7.
BLOWHOLES
This blowhole is one of several openings to a series of
underground cracks and caves in this area. The system
of cracks has a minimum volume of seven billion cubic
feet -- equivalent to one room a mile square by 28
stories high! At different times of the day you can
hear air rushing through the vent.
Changes in air pressure at the surface make the blowholes
blow. Daily warming and cooling of the air, thunderstorms,
and weather fronts all affect the air pressure. Usually
air flows into the vent in the night and early morning
and out during the afternoon -- sometimes at 30 miles
per hour!
NIGHT
DAY
Cool, Heavy Air
pressure lower than at surface, so air rushes in
Warm, Light Air
pressure higher than at surface, so air rushes out
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a "ball court" indicating cultural influences
from peoples in Mexico and Central America.
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on the far side of the oval, facing back up
to the outlying building on the rise and,
11.
another look back into the oval ring before
returning up to the Wupatki Pueblo.
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moving further to the southeast facing more west,
and looking west from the east side of the Pueblo.
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Wukoki Pueblo
WUPATKI
MESA VERDE
AZTEC
CHACO CANYON